This Sign is available in two versions: a free, ready-to-use version and a $1.99 editable version.

The free version is available in Acrobat (.PDF) format: just download one, open it in Acrobat (or another program that can display the PDF file format,) and print.

The $1.99 version can be edited. It is compatible with Microsoft Word, Google Docs, and any other word processing app that's compatible with the Microsoft Word .DOC format.
The editable version can be customized with your hours, contact information, etc. You can pay using your PayPal account or credit card. You'll be able to download the customizable sign within moments.